#include<stdio.h>
#include<string.h>
#include<unistd.h>
#include<sys/types.h>
int main()
{
    const  char* s1="hello printf\n";
    const  char* s2="hello fwrite\n";

    printf("%s",s1);
    fwrite(s2,1,strlen(s2),stdout);
    fork();
    return 0;
}
